Turn off the fan and use a closed rotor. Turning off the fan is called an air lock device. Mainly because the damper can be transported in pressure conveying, suction conveying air conveying system and negative pressure conveying equipment. The air pressure in the pipeline will not leak.

The fan can not only transport and collect materials safely, it has a compact structure and is pressure resistant. The gear box and bearing are separated from the shell by a certain distance, which can improve lubrication and high temperature.

The shut-off fan relies on the mechanical energy of gas compression and transportation (gas compression and transportation machinery converts rotating machinery into gas pressure energy and kinetic energy) to increase the gas pressure, and then transport the gas out.

The air shutter has an electric push rod and an automatic locking two-way safety system. The gear motor drives the coupling impeller to rotate. The structure is compact. The material is evenly transported from the upper part of the shell to the lower part to prevent large material particles and dust from squeezing into the bearing and getting stuck. Reliable and flexible work performance.

The air shutter can prevent dust from squeezing into the bearing and prevent large particles from blocking, mainly because the fan's electric push rod and automatic locking mechanism have a two-way safety system.

When the fan is turned off, the geared motor uses the coupling to drive the impeller to rotate, and the material in the upper part of the shell is evenly transported to the lower part, and the material is transported away by the next device, and the work is flexible and stable. Reduce belt wear and extend the service life of belt conveyors.

   According to the law of proportionality and the law of cutting, the performance curve of the fan changes the speed of the fan. Rotating the impeller diameter can change the performance curve of the fan, so as to achieve the purpose of adjusting the flow rate (at the same time changing the pressure head). When changing the fan speed, the operating point will change.

Pipeline characteristic curve-When the opening of the fan outlet valve changes, the operating point also changes when the opening of the valve changes. Opening the valve makes the value decrease, the pipeline characteristic curve becomes flat, and the flow rate increases; on the contrary, when the valve is closed, the flow rate decreases. Turning off the valve of the fan can quickly and easily adjust the flow rate, and the flow rate can be changed continuously.

How to use the fan to prevent air leakage? It must be ensured that the discharge volume is sufficient, and when the fan is turned off and the operation is stopped, the bore cannot be completely discharged.

If there is no air leakage at the fan connection, there will be a certain amount of dust on the upper part of the unloader (if the impeller rotates without dust, it is easy to cause air leakage).

In order to maintain a certain height of the ash column and prevent the blower from being unloaded, a material level signal device can be installed in the ash hopper to establish a connection with the motor.